REISERFS warning (device loop5): super-6502 reiserfs_getopt: unknown mount option "ÿî§<< G4š¶mRŸ±â½ÆuÆÌëê0º‰wÆ2ÝËàíù†¶Žæ" xt_cgroup: xt_cgroup: no path or classid specified BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/23873 is trying to acquire lock: 000000007372a45b (&fs_info->qgroup_ioctl_lock){+.+.}, at: btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 but task is already holding lock: 000000004f7861e7 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 000000004f7861e7 (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sb_internal#2){.+.+}: sb_start_intwrite include/linux/fs.h:1626 [inline] start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 btrfs_quota_enable+0x169/0x10b0 fs/btrfs/qgroup.c:905 btrfs_ioctl_quota_ctl fs/btrfs/ioctl.c:5233 [inline] btrfs_ioctl+0x622c/0x76d0 fs/btrfs/ioctl.c:6021 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&fs_info->qgroup_ioctl_lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_internal#2); lock(&fs_info->qgroup_ioctl_lock); lock(sb_internal#2); lock(&fs_info->qgroup_ioctl_lock); *** DEADLOCK *** 2 locks held by syz-executor.3/23873: #0: 0000000056a000d3 (sb_writers#22){.+.+}, at: sb_start_write include/linux/fs.h:1579 [inline] #0: 0000000056a000d3 (sb_writers#22){.+.+}, at: mnt_want_write_file+0x63/0x1d0 fs/namespace.c:418 #1: 000000004f7861e7 (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] #1: 000000004f7861e7 (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 stack backtrace: CPU: 1 PID: 23873 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 btrfs_limit_qgroup+0x63/0x7b0 fs/btrfs/qgroup.c:1467 btrfs_ioctl_qgroup_limit fs/btrfs/ioctl.c:5386 [inline] btrfs_ioctl+0x3c0c/0x76d0 fs/btrfs/ioctl.c:6027 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1f532b20c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1f51824168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f1f533d1f80 RCX: 00007f1f532b20c9 RDX: 00000000200011c0 RSI: 000000008030942b RDI: 0000000000000004 RBP: 00007f1f5330dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf04fbd0f R14: 00007f1f51824300 R15: 0000000000022000 BTRFS error (device loop3): fail to start transaction for status update: -28 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. overlayfs: unrecognized mount option "work`ir=./bus" or missing value xt_cgroup: xt_cgroup: no path or classid specified IPVS: ftp: loaded support on port[0] = 21 REISERFS (device loop5): found reiserfs format "3.6" with non-standard journal REISERFS (device loop5): using ordered data mode reiserfs: using flush barriers REISERFS (device loop5): journal params: device loop5, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30 REISERFS (device loop5): checking transaction log (loop5) REISERFS (device loop5): Using r5 hash to sort names REISERFS warning (device loop5): jdm-13090 reiserfs_new_inode: ACLs aren't enabled in the fs, but vfs thinks they are! REISERFS (device loop5): Created .reiserfs_priv - reserved for xattr storage. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. xt_cgroup: xt_cgroup: no path or classid specified BTRFS info (device loop3): using free space tree BTRFS info (device loop3): has skinny extents netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. BTRFS error (device loop3): open_ctree failed xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified syz-executor.2 (24106): drop_caches: 2 syz-executor.2 (24109): drop_caches: 2 syz-executor.2 (24106): drop_caches: 2 syz-executor.2 (24109): drop_caches: 2 BTRFS info (device loop3): using free space tree F2FS-fs (loop5): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop5): Can't find valid F2FS filesystem in 1th superblock BTRFS info (device loop3): has skinny extents syz-executor.2 (24098): drop_caches: 2 syz-executor.2 (24098): drop_caches: 2 F2FS-fs (loop5): invalid crc_offset: 553652220 F2FS-fs (loop5): Found nat_bits in checkpoint F2FS-fs (loop5): recover fsync data on readonly fs F2FS-fs (loop5): Mounted with checkpoint version = 753bd00b BTRFS error (device loop3): fail to start transaction for status update: -28 xt_cgroup: xt_cgroup: no path or classid specified syz-executor.2 (24198): drop_caches: 2 xt_cgroup: xt_cgroup: no path or classid specified syz-executor.2 (24198): drop_caches: 2 syz-executor.2 (24199): drop_caches: 2 syz-executor.2 (24199): drop_caches: 2 xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified F2FS-fs (loop5): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop5): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop5): invalid crc_offset: 553652220 F2FS-fs (loop5): Found nat_bits in checkpoint ieee802154 phy0 wpan0: encryption failed: -22 xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: unrecognized mount option "pcr=00000000000000000056" or missing value xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified hub 9-0:1.0: USB hub found qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified hub 9-0:1.0: 8 ports detected xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: 'file0' not a directory xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: unrecognized mount option "pcr=00000000000000000056" or missing value xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: './file0' not a directory xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: unrecognized mount option "pcr=00000000000000000056" or missing value qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified overlayfs: unrecognized mount option "pcr=00000000000000000056" or missing value xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: unrecognized mount option "pcr=00000000000000000056" or missing value xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_cgroup: xt_cgroup: no path or classid specified overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_cgroup: xt_cgroup: no path or classid specified xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock xt_cgroup: xt_cgroup: no path or classid specified qnx4: unable to read the superblock overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off.